生物炭对土壤中氮转化的影响

Effects of Biochar on Nitrogen Conversion in Soil

为了进一步理清生物炭对土壤中氮转化的影响与机制,在知网数据库中以生物炭、氮转化等为关键词搜索相关文献,进行总结归纳。结果表明,多数研究发现,土壤中加入生物炭可促进硝化速率的提升、抑制土壤反硝化速率、提高氮肥利用率及土壤对铵态氮和硝态氮的固持作用等。但也有研究表明,土壤中加入生物炭会使土壤N_(2)O排放速率升高,降低土壤硝化速率,这主要与土壤类型及其含水孔隙率、生物炭类型等密切相关。探讨了生物炭对土壤氮循环影响的研究趋势、重点领域及主要成果,提出了一些新的研究方法,为深入理解生物炭对土壤理化性质变化的影响机理及其在现代农业发展中的应用提供参考。

In order to further clarify the influence and mechanism of biochar on soil nitrogen conversion,the study searches relevant literature in CNKI with biochar and nitrogen conversion as keywords,and then summarizes.The results show that most studies have found that the addition of biochar in soil can promote the nitrification rate,inhibit the denitrification rate of soil,improve the nitrogen utilization rate and the soil retention of ammonium nitrogen and nitrate nitrogen,etc.However,some studies have shown that the addition of biochar in soil can increase the N_(2)O emission rate of soil and reduce the nitrification rate of soil,which is mainly closely related to the soil type and its water-containing porosity and biochar type.Then the study discusses the research trends,key areas and main achievements of the effects of biochar on soil nitrogen cycle,and proposes some new research methods to provide reference for further understanding of the mechanism of the effects of biochar on soil physical and chemical properties,and its application in modern agriculture.